A mystical stone guides a woman through her life.

From the latest winner of the National Book Award for Fiction: a former nun's infatuation with classical music leads to unexpected connections and actions.

" At any rate, she played Chopin. Played him in utter naturalness until the Mother Superior was forced to shut the cover to the keyboard and gently pull the stool away. Cecellia lifted the lid and played upon her knees. The poor scandalized dame dragged her from the keys. Cecellia crawled back. The Mother, at her wit's end, sank down and urged the young woman to pray. She herself spoke first in fear and then in certainty, saying that it was the very Devil who had managed to find a way to Cecellia's soul through the flashing doors of sixteenth notes. Her fears were confirmed when, not moments later, the gentle sister raised her arms and fists and struck the keys as though the instrument were stone and from the rock her thirst would be quenched. But only discord emerged."